EP2742248A1 - Axially loadable rolling bearing arrangement with magnetic pre-load device - Google Patents
Axially loadable rolling bearing arrangement with magnetic pre-load deviceInfo
- Publication number
- EP2742248A1 EP2742248A1 EP12746092.1A EP12746092A EP2742248A1 EP 2742248 A1 EP2742248 A1 EP 2742248A1 EP 12746092 A EP12746092 A EP 12746092A EP 2742248 A1 EP2742248 A1 EP 2742248A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bearing
- transmission element
- force
- ring
- force transmission
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000005096 rolling process Methods 0.000 title claims abstract description 27
- 230000005291 magnetic effect Effects 0.000 title claims description 33
- 230000036316 preload Effects 0.000 title description 6
- 230000005540 biological transmission Effects 0.000 claims description 83
- 239000000696 magnetic material Substances 0.000 claims description 13
- 230000005294 ferromagnetic effect Effects 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 230000004907 flux Effects 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C25/00—Bearings for exclusively rotary movement adjustable for wear or play
- F16C25/06—Ball or roller bearings
- F16C25/08—Ball or roller bearings self-adjusting
- F16C25/086—Ball or roller bearings self-adjusting with magnetic means to preload the bearing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
- F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
- F16C19/16—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls
- F16C19/163—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls with angular contact
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
- F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
- F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C39/00—Relieving load on bearings
- F16C39/06—Relieving load on bearings using magnetic means
- F16C39/063—Permanent magnets
Definitions
- Embodiments of the invention are concerned with bearing arrangements, in particular bearing arrangements, which can bear not only radial loads but also loads acting in the axial direction.
- rolling bearings which can also carry an axial load component in addition to a radial load, z.
- an arrangement of two or more bearings is conventionally installed to maintain the bearing preload in the axial direction, which are biased or biased relative to each other. That is, even if an axial load can occur only in a single direction, among other things, to improve the rigidity, to secure against reverse loads and / or the bias at minimum loads two bearings are used, which are installed relative to each other in X or O arrangement ,
- the bias is done by a force applied to the bias voltage (eg by means of springs or projection) is exerted on an inner ring or on an outer ring of the bearing.
- a force applied to the bias voltage eg by means of springs or projection
- the so-called “backup bearing” being used only for preloading, or at possibly short-term occurring load changes to absorb small forces in the other direction.
- the second bearing permanently causes additional friction, which on the one hand increases the operating costs and, on the other hand, restricts the maximum achievable speed with the bearing arrangement. There is thus a need to improve bearing arrangements that can accommodate axial loads.
- the embodiments of the present invention make it possible to obviate the drawbacks described above by using a bearing assembly comprising a single rolling bearing having a bearing inner race and a bearing outer race spaced apart in a radial direction from the bearing inner race, the bearing assembly further comprising a magnet assembly , By means of which a bias voltage serving force between the bearing inner ring and bearing outer ring can be generated.
- the magnet arrangement is coupled to the bearing inner ring or the bearing outer ring in such a way that an attractive force generated by the magnet arrangement by means of a permanent magnet acting in or against an axial direction perpendicular to the radial direction, in or against the axial direction acting force between the bearing inner ring and the bearing outer ring causes, which serves a bias of the rolling bearing in the main load direction.
- the magnet assembly may consist of so connected to the bearing inner ring or with the bearing outer ring or coupled magnet that caused by the magnet force is introduced into the bearing inner ring or bearing outer ring and thus causes a force which is a bias of the rolling bearing in a Main load direction of the rolling bearing causes.
- the rolling bearing is loaded, for example, during operation mainly in the axial direction, so that is transmitted from a first bearing ring on the rolling elements in the axial direction of force to a second bearing ring, the biasing force acting in the axial direction and causes one of the first bearing ring via the rolling elements in the axial direction acting on the second bearing ring force.
- a first bearing inner ring, a first power transmission element and the second bearing inner ring, a second power transmission element coupled which extend in the radial direction and are arranged so that they overlap in the radial direction, so that in the thus formed Overlap an axial gap between the two power transmission elements is formed.
- at least one permanent magnet is arranged in the overlap region, so that an attractive magnetic force acting across the axial gap between the first and the second force transmission element results in a force acting predominantly in the axial direction between the bearing inner ring and the bearing outer ring.
- a required bearing preload can thus be achieved without the need for a further, expensive and space-consuming bearing.
- the friction of the entire bearing assembly can be reduced, as well as the entire setup can be simplified.
- the total space consumed by the bearing assembly may be reduced and the bias voltage implemented independently of the other geometric constraints of the article to be stored. Due to the possibility of also bridging air gaps by the magnetic force, the bias voltage is particularly insensitive to thermal changes, fits, bearing seat tolerances, etc., so that the entire bearing arrangement can have an extended range of use or an extended range of possible operating temperatures, which is likewise possible can lead to higher maximum speeds.
- a force transmission element is coupled both to the bearing inner ring and to the bearing outer ring, which in the radial direction is connected to the force transmission element of the opposite overlaps bearing ring. That is, either both power transmission elements extend in the radial direction far enough to the opposite bearing ring that they overlap in their radial extent each with the radial extent of the other power transmission element, or the power transmission element of the bearing inner ring or the bearing outer ring extends in the radial direction so far that it overlaps with the opposite bearing ring itself.
- At least one permanent magnet is arranged, which ensures a force acting in or against the axial direction between the bearing inner ring and the bearing outer ring.
- the second force transmission element of the bearing ring itself or a surface or volume region thereof may be formed.
- the power transmission elements are arranged rotationally symmetrical and concentric with the axis of rotation of the bearing.
- a plurality of equidistantly arranged permanent magnets are arranged along the circumference of the first or the second force transmission element within the region of the overlap or within the overlap region, resulting in an axially acting, uniform attractive force between bearing outer ring and bearing inner ring ,
- a ring of permanent magnetic material is arranged along the circumference of the first or the second force transmission element within the overlap region, which ring runs concentrically to the bearing inner ring or to the bearing outer ring. Additionally, along the circumference of the first or second force
- at least one ferromagnetic yoke coupled to the annular permanent magnet may be provided within the overlap region for purposefully controlling a resultant magnetic flux.
- a concentric arrangement of annular permanent magnet and the at least one annular ferromagnetic yoke surrounding the magnet no large gradient of the magnetic field in the direction of rotation occurs during operation of the bearing, ie during rotation, so that eddy current losses remain low.
- a concentric arrangement of the magnet and the at least one yoke means an arrangement which has at least one radial gap between the magnet and the at least one yoke.
- a first and a second ring of a permanent magnetic material may be arranged, which run concentrically to the bearing inner ring or to the bearing outer ring. Due to the concentric arrangement, during operation of the bearing, ie during rotation, no large gradient of the magnetic field in the direction of rotation occurs, so that the eddy current losses remain low.
- a north magnetic pole of the first ring faces toward the opposite force transmitting member without a magnet, while a south magnetic pole of the second ring also points toward that force transmitting member.
- both the first and second force-transmitting elements extend in the radial direction to the overlap position. rich, wherein one of the two power transmission elements U- or fork-shaped, so that it overlaps with the other power transmission element in the axial direction on both sides.
- a permanent magnet is disposed on the U-shaped power transmission element on both surfaces facing the surface of the other power transmission element. This makes it possible, by varying the distances between the U-shaped power transmission element and the other power transmission element, to exert a directed net force on the bearing in the axial direction.
- the magnetic force in the axial direction may act to provide preload of the rolling bearing, while in other embodiments, the dynamic load, that is, the load bearing the bearing, may be additionally supported by the magnet assembly, such that the bearing is relieved. This can for example lead to the use of a bearing of lower load rating and thus to significant cost and space savings.
- a mechanical adjustment mechanism is further coupled to the U-shaped power transmission member or to the power transmission member of the other bearing ring to produce a variable total force by varying the distances and thus the acting magnetic forces.
- these embodiments also make it possible to dynamically support the rolling bearing, which may allow a smaller rolling bearing.
- Figure 1 shows an embodiment of a bearing assembly with a magnet assembly with a permanent magnet
- Figure 2 shows another embodiment of a bearing assembly with a magnet assembly having two concentric rings of permanent magnetic material
- Figure 3 shows different side views of the embodiments of Figures 1 and 2;
- Figure 4 shows another embodiment of a bearing assembly with alternative arrangement of the power transmission elements
- Figure 5 shows another embodiment of a bearing assembly
- Figure 6 shows another embodiment of a bearing assembly
- FIG. 7 shows an exemplary embodiment of a bearing arrangement with a magnet arrangement coupled to a bearing outer ring
- FIG. 8 shows a further exemplary embodiment of a bearing arrangement with a magnet arrangement coupled to a bearing outer ring
- Figure 9 shows an embodiment of a bearing assembly with in and against the axial direction acting forces.
- FIG. 1 shows a section through a bearing arrangement.
- the bearing arrangement comprises a roller bearing with a bearing inner ring 2 and a bearing outer ring 4, which lie opposite one another in a radial direction 6, that is to say they are spaced apart in the radial direction 6. Between the bearing inner ring 2 and the bearing outer ring 4, the rolling elements 8, in the angular ball bearing shown balls 8 run.
- the angular contact ball bearing shown in Figure 1 due to the geometry of the raceways of the bearing rings an axial load, that is, carry a load in an axial direction 10 , which is perpendicular to the radial direction 6.
- the bearing outer ring 4 is fixed in the axial direction by means of only indicated abutments 12 and 14, so that the main load in the axial direction 10 should take place.
- the bearing assembly of FIG. 1 further includes a magnet assembly including a permanent magnet 16 located on a power transmission member 18 extending from the bearing inner race 2 in the radial direction 6.
- a magnet assembly including a permanent magnet 16 located on a power transmission member 18 extending from the bearing inner race 2 in the radial direction 6. This is presently formed integrally with the bearing inner ring 2, rotationally symmetrical and extends as a disk in the radial direction 6 so far in the direction of the bearing outer ring 4, that the force transmission element 18 of the bearing inner ring 2 and the outer bearing ring 4 overlap in the radial direction.
- the force transmission element 21 of the bearing outer ring 4 is formed by the geometric shape thereof or the force transmission element 21 is integrally formed with the bearing outer ring 4.
- the permanent magnet 16 is inserted in the overlap region 20 in the force transmission element 18 of the bearing inner ring 2 and connected thereto.
- the permanent magnet 16 may be mounted as a rotationally symmetrical, annular magnet on the power transmission element 18, so that the magnetic force along the entire circumference of the La coulter ring 2 and the bearing outer ring 4 acts (see also the illustration of Figure 3, right).
- annular magnet 16 may still be coupled to at least one ferromagnetic yoke to optimize and / or reverse a resultant magnetic flux through the force transmitting member 21 on which no permanent magnetic material is disposed for maximum attraction of the two force transmitting members 18, 21 To keep eddy current losses low, as will be described below.
- the permanent magnet 16 as seen for example from the view of the power transmission element 18 of the left illustration of Figure 3, also comprise a plurality of equidistant along the circumference of the force transmitting member 18 arranged magnet 16, which makes it possible to use standard magnets and thus keeping production costs low.
- the attracting magnetic force generated by means of the permanent magnet is used to effect an attractive force acting in the axial direction 10 between the bearing inner race 2 and the bearing outer race 4, by means of which the bearing can be biased.
- a second, so-called “backup bearing” which leads to a simplified overall arrangement and a lower friction of the bearing arrangement, while the air gap 22 also makes the bearing arrangement less susceptible to thermal or mechanical deformation
- FIG. 2 shows a further exemplary embodiment of a bearing arrangement, which largely corresponds to the exemplary embodiment shown in FIG. In a modification of the embodiment shown in FIG. 1, however, the embodiment shown in FIG. Asked embodiment in the overlap region 20 along the circumference of the power transmission element 18, an array of two concentric rings of permanent magnetic material 24a and 24b.
- the rings are concentric with the axis of symmetry of the bearing inner ring 2 and the bearing outer ring 4.
- the magnet arrangement shown in FIG. 2 leads, as is apparent from FIG Enlarged section can be seen, to the course of the magnetic field lines shown there.
- the polarization directions 28a and 28b of the permanent magnetic material 24a and 24b aligned in the direction indicated in Figure 2 direction or a similar thereto direction, can be achieved in that the solenoid ⁇ field is mostly concentrated in the overlap region 20, resulting in low losses through non-directional or by stray fields. In other words, this is the case when
- a magnetic north pole of the first permanent magnet ring 24a points in the direction of the force transmission element 21 of the bearing outer ring 4 and in the direction of the air gap 22 and when a magnetic south pole of the second permanent magnet ring 24b also points in this direction.
- a single annular permanent magnet 16 may also be suitably coupled to at least one ferromagnetic yoke to optimize the magnetic flux or magnetic field losses.
- at least one yoke made of ferromagnetic material eg iron
- the axial radial ends of the annular permanent magnet 16 can be polarized differently in the embodiment according to FIG be.
- a (left) axial end surface of the magnet 16 is coupled directly to the yoke 23, between each in the radial direction 6 facing and parallel surfaces of the permanent magnet 16 and the yoke 23 each have an air gap 25 is provided to a corresponding closed field line course by magnet 16, yoke 23, air gap 22 and force transmission element 21 to obtain.
- Such a comparable or comparable arrangement of annular permanent magnet 16 and surrounding ferromagnetic (eg metallic) holes 23 does not cause any large gradient of the magnetic field in the direction of rotation during operation of the bearing, ie during rotation, so that eddy current losses are low stay.
- the arrangement shown by way of example in FIG. 1 is only to be understood by way of example as one of many possible embodiments with permanent magnets 16 and yokes 23 coupled thereto.
- FIG. 4 shows a further exemplary embodiment of a bearing arrangement which essentially corresponds to the bearing arrangement shown in FIG. 1, for example as regards the main force direction.
- the difference from the embodiment described in FIG. 1 is that the permanent magnetic rings 24a and 24b are arranged on the magnet arrangement corresponding to the bearing outer ring 4 or on the corresponding force transmission element, so that the permanent magnet rings 24a and 24b, for example, on the fixed one of the two Bearing rings can be arranged.
- the preloading permanent magnetic elements can be attached to both the fixed and rotating members, which is not the case with other biasing methods such as springs or the like is possible because they can be regularly attached only to a fixed element.
- the bearing inner ring 2 is fixed via a shoulder 30 in the axial direction 10 with respect to the force transmission element 18 serving for force transmission.
- the bearing outer ring 4 associated force transmission element 21, which has the two rings of permanent magnets 24a and 24b is fixed relative to the bearing outer ring 4 via the housing or other part not shown in and against the axial direction 10, so that also from the magnets 24a and 24b applied to a preload of the bearing in the direction of the main load, present in the axial direction 10 leads.
- FIG. 6 shows a further exemplary embodiment that deviates from the function of the exemplary embodiment shown in FIG.
- the force transmission elements 18 and 21 are interchanged in their axial orientation 10 as compared to the configuration shown in FIG. This can be achieved overall relief of the 30 caused by the shoulder bias of the bearing, since the directed in the axial direction 10 biasing force of the shoulder 30 and counter to the axial direction 10 directed magnetic force on the force transmission element 18 at least partially compensate.
- a total acting biasing force in the direction 10 is additionally reinforced by the magnetic force on the power transmission element 18.
- FIGS. 7 and 8, like FIGS. 5 and 6, show further embodiments with which it is possible, by means of the geometrical arrangement of the force transmission elements, to use an angular contact ball bearing or a deep groove ball bearing with a magnetic bearing. harnessing power. Since the basic mode of operation, with the exception of the exact geometrical design of the force transmission elements, corresponds to that already discussed with reference to FIGS. 5 and 6, a further discussion of these components is dispensed with.
- FIG. 9 shows a further embodiment of the present invention, or another possible magnet arrangement which can be combined with or used within all of the previously discussed embodiments of bearing arrangements.
- At least one ring of permanent magnetic material 16 is arranged on each of the sides of the force transmission element 21 associated with the force transmission element 18 so that an attracting force acts on the force transmission element 18 both in and against the axial direction 10.
- the magnetic forces keep the balance and the net force acting on the force transmission element 18 is Zero. This makes it possible, for example, via a variation of the width of the air gaps 34a and 34b, which arise between the two arms of the power transmission element 21 and the power transmission element 18, to generate a directed total or net force both in and against the axial direction.
- Such a variation of the position of the force transmission element 21 or the widths of the air gaps 34a and 34b may be preset mechanically or mechanically during operation, for example. This can be done for example by means of a Pneumatic, hydraulic, electrically or by means of a servomotor or other actuator, which changes the relative position of the power transmission element 21 and the power transmission element 18.
- the change may also be effected via a suitable mechanism depending on a centrifugal force acting on the system. This may serve, for example, to increase the magnetic force depending on the centrifugal force so that there are no no-load problems that typically occur at high speeds. Thereby, a concomitant bearing wear can be avoided.
- the distance between the magnet rings 16 itself can be varied so that, for example, only the width of one of the air gaps 34a or 34b is varied in order to set the total force.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
- Rolling Contact Bearings (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011080796.9A DE102011080796B4 (en) | 2011-08-11 | 2011-08-11 | Axially load bearing arrangement |
PCT/EP2012/065706 WO2013021047A1 (en) | 2011-08-11 | 2012-08-10 | Axially loadable rolling bearing arrangement with magnetic pre-load device |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2742248A1 true EP2742248A1 (en) | 2014-06-18 |
Family
ID=46650548
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12746092.1A Withdrawn EP2742248A1 (en) | 2011-08-11 | 2012-08-10 | Axially loadable rolling bearing arrangement with magnetic pre-load device |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2742248A1 (en) |
DE (1) | DE102011080796B4 (en) |
WO (1) | WO2013021047A1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102015105338A1 (en) * | 2015-04-08 | 2016-10-27 | Lti Motion Gmbh | Tool drive with spindle shaft and operating method |
GB2546989B (en) * | 2016-02-03 | 2018-08-29 | Rolls Royce Plc | Bearing arrangements |
US10520016B2 (en) * | 2017-11-10 | 2019-12-31 | Taurus Technologies Group, Inc. | Bearing roller elements and assembly |
CN107906133B (en) * | 2017-12-19 | 2024-06-21 | 天门进保(天津)科技股份有限公司 | Dense-bead shafting high-precision bearing main shaft |
CN110242668B (en) * | 2019-06-27 | 2024-05-07 | 中国船舶重工集团公司第七一九研究所 | Vibration suppression bearing device and vibration suppression method |
US11835088B2 (en) * | 2021-05-28 | 2023-12-05 | Rolls-Royce North American Technologies, Inc. | Thrust bearing for a rotating machine |
CN113654113B (en) * | 2021-08-10 | 2022-11-15 | 中山市爱美泰电器有限公司 | Heat pump air conditioner with dehumidification function |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61206817A (en) * | 1985-03-11 | 1986-09-13 | Mitsubishi Electric Corp | Bearing gap regulating method |
EP0266991A3 (en) | 1986-11-07 | 1989-05-03 | Hewlett-Packard Company | Magnetic preload for motor shaft bearing |
JPS6469817A (en) * | 1987-09-11 | 1989-03-15 | Canon Kk | Bearing device |
JPH0754842A (en) * | 1993-08-12 | 1995-02-28 | Sony Corp | Roller bearing |
DE19500935C2 (en) * | 1994-01-14 | 1997-10-02 | Univ Stuttgart | Bearing arrangement |
JPH10238535A (en) | 1997-02-27 | 1998-09-08 | Nippon Seiko Kk | Spindle motor for disc |
US6898052B1 (en) | 2002-07-31 | 2005-05-24 | Western Digital Technologies, Inc. | Spindle motor including magnetic element for pre-loading a ball bearing set |
DE10320851A1 (en) | 2003-05-09 | 2004-11-25 | Leybold Vakuum Gmbh | turbopump |
WO2007066473A1 (en) * | 2005-12-09 | 2007-06-14 | Ntn Corporation | Magnetic bearing device |
-
2011
- 2011-08-11 DE DE102011080796.9A patent/DE102011080796B4/en active Active
-
2012
- 2012-08-10 EP EP12746092.1A patent/EP2742248A1/en not_active Withdrawn
- 2012-08-10 WO PCT/EP2012/065706 patent/WO2013021047A1/en active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2013021047A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE102011080796B4 (en) | 2023-05-25 |
WO2013021047A1 (en) | 2013-02-14 |
DE102011080796A1 (en) | 2013-02-14 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2013021047A1 (en) | Axially loadable rolling bearing arrangement with magnetic pre-load device | |
EP3180542B1 (en) | Magnetic damper for vibration absorber | |
DE102015213727B4 (en) | VOICE COIL MOTOR AND DIRECT ACTING SERVO VALVE USING THE VOICE COIL MOTOR | |
EP1313951A1 (en) | Vacuum pump | |
EP2992378A1 (en) | Scanner device | |
EP3356693A1 (en) | Bearing, in particular for a magnetic levitation assembly | |
EP3095119A1 (en) | Electromagnetic and dynamic actuator for active assembly bearings | |
WO2010136325A2 (en) | Bearing arrangement for a touch-free magnetic axial bearing and x-ray tubes with said bearing | |
WO2017194352A1 (en) | Electrical machine having a double rotor arrangement | |
EP1748207A2 (en) | Electrically actuated friction disc clutch and rotor for such a clutch | |
EP4067682A1 (en) | Spinning rotor bearing of a rotor spinning device with a rotor shaft and a bearing unit | |
DE102012202267B4 (en) | bearing arrangement | |
EP3583615B1 (en) | Electromagnetic linear actuator | |
EP2208900A1 (en) | Ball bearing unit | |
WO2011151339A1 (en) | Method and device for adjusting the bearing play in a ceramic hybrid bearing | |
EP1495235B1 (en) | Magnetic guiding device | |
DE2143001A1 (en) | BISTABLE AXIAL GUIDE FOR SLOTS AND THE LIKE | |
DE102008058319B4 (en) | roller bearing | |
DE102013220222A1 (en) | bearing device | |
DE102020115365B3 (en) | Rotor for a synchronous machine and synchronous machine with such a rotor | |
DE102013215558A1 (en) | Device for compensating a temperature-induced radial change in bias in a rolling bearing assembly | |
EP1028262A1 (en) | Electromagnetic bearing device | |
DE102021107842A1 (en) | COMBINED AXIAL/RADIAL MAGNETIC BEARING | |
WO2023241749A1 (en) | Actuating device for a vehicle and method for operating an actuating device | |
DE102022113082A1 (en) | Drive unit for a spinning rotor of a rotor spinning device |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20131219 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
DAX | Request for extension of the european patent (deleted) | ||
17Q | First examination report despatched |
Effective date: 20150417 |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
INTG | Intention to grant announced |
Effective date: 20160707 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: GRANT OF PATENT IS INTENDED |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20161118 |